I agree with Sparky, some plumber's work here leaves a lot to be desired, although I'm usually not concerned with the low-voltage work they do.
Even worse than plumbers are HVAC guys who do their own wiring on air conditioners and air handlers they install. I have seen flying Romex with no staples or support for 12 feet, diconnect switches falling off the side of the house, no romex connectors, etc etc.
